/* 基本框架 */
*{
    margin: 0;
    padding: 0;
}
.first{
    width: 75%;
    height: 400px;
    /* border: 1px red solid; */
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: auto;
    margin-top: 30px;
}
.first_left{
    height: 100%;
    width: 35%;
    /* border: 1px solid black;     */
}
.banner{
    width: 60%;
    height: 100%;
   
}

/* first_left */
.first_left{
    display: flex;
    flex-direction: column;
    position: relative;
  
}
.first_left>div{
    width: 100%;
    height: 100px;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    background-color: skyblue;
    color: white;
    font-weight: 700;
    font-size: 30px;
}
.first_left>div:hover{
    background-color: gray;
}
/* flow */
.first_left .flow{
    z-index: 1;
    position: absolute;
    left: 100%;
    height: 400px;
    top: 0;
    width:calc(100% * 1.7);
    background-color:white;
    color: white;
    display: none;
}

.flow{
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;

}
.flow p{
    border-radius: 12px;
    color: black;
    background-color: gray;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 700;
}


/* banner轮播图 */

.banner{
    position: relative;
}
.banner img{
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
}
.banner p{
    position: absolute;
    width: 60px;
    top: 50%;
    transform: translateY(-50%);
    height: 60px;
    background-color: gray;
    color: white;
    font-weight: 700;
    font-size: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.banner_span{
    width: 70%;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    height: 60px;
    position: absolute;
    top: 0;
    right: 0;
}
.banner_span span{
    width: 40px;
    height: 40px;
    
    border-radius: 50%;
    color: white;
    background-color: black;
    display: flex;
    justify-content: center;
    align-items: center;
}
.banner_span span:hover{
    background-color: gray;
}
.banner_span .active{
    background-color: gray;
}


/* second */
.second{
    width: 75%;
    
    height: 400px;
  
    margin: auto;
    margin-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.second1{
    width: 60%;
    height: 90%;
    border-top: 2px solid blue;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-evenly;
    box-shadow: 0px 0px 3px black;
}
.second2{
    width: 38%;

  box-shadow: 0px 0px 3px black;
    height: 90%;
}

.second_head{
    width: 100%;
    height: 80px;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    border-bottom: 1px solid black;
}
.second_head span{
    height: 80%;
    justify-content: center;
    align-items: center;
    display: flex;
    font-size: 30px;
}
.second_head p{
    font-weight: 700;
    font-size: 25px;
    cursor: pointer;
    color: blue;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 30%;
    height: 100%;
}
.second_head .active{
    color: red;
}
/* second_body */
.second_body{
    width: 100%;
    height: 70%;
  
    display: flex;
    justify-content: center;
    align-items: center;
}
.second_body p{
    width: 90%;
    height: 90%;
    text-indent: 2em;
    font-size: 20px;
    font-weight: 700;
}

/* second2 */
.second2 img{
    height: 55%;
    width: 100%;
}
.second2 p{
    height: 45%;
    width: 100%;
    text-indent: 2em;
    font-size: 20px;
    color: red;
    font-weight: 700;
}

/* third */
.third{
    width: 75%;
    height: 200px;
   
    margin: auto;
    border-top: 2px solid skyblue;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    flex-direction: column;
    box-shadow: 0px 0px 2px black;
    position: relative;
    overflow: hidden;
    margin-top: 50px;
  
}
.third_head{
    height: 30%;
    width: 90%;
   
    position: absolute;
    top: 0;
    left: 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.third_body{
    /* width: 100%; */
    height: 100%;
}
.third p{
    font-size: 23px;
    font-weight: 700;
    color: skyblue;
}
.third_span{
    width: 200px;
    height: 100%;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
}
.third_span span{
    border-radius: 50%;
    background-color: blue;
    width: 20px;
    height: 20px;
}
.third_span .active{
    background-color: gray;
    
}
/* third_body */
.third_body{
    display: flex;
    justify-content: space-evenly;
    align-items: center;

}
.third_body div{
    width: 95%;
    height: 100%;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
}
.third_body div img{
    border-radius: 20px;
    width: 20%;
    height: 80%;
}
/* third_body_box */
.third_body_box{
    position: absolute;
    top: 30%;
    left: 0;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    width: 300%;
    height: 70%;
    transition: left 0.6s linear;
}

footer{
    margin-top: 60px;
    width: 100%;
    height: 100px;
    background-color: gray;
}
footer p{
    width: 100%;
    text-align: center;
    height: 100%;
    line-height: 100px;
    font-size: 50px;
    color: white;
    font-weight: 700;
}